DM: crypto/rsa_mod_exp: Add rsa Modular Exponentiation DM driver
Add a new rsa uclass for performing modular exponentiation and implement
the software driver basing on this uclass.
Signed-off-by: Ruchika Gupta <ruchika.gupta@freescale.com>
CC: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/crypto/rsa_mod_exp/Kconfig b/drivers/crypto/rsa_mod_exp/Kconfig
new file mode 100644
index 0000000..6dcb39a
--- /dev/null
+++ b/drivers/crypto/rsa_mod_exp/Kconfig
@@ -0,0 +1,5 @@
+config DM_MOD_EXP
+ bool "Enable Driver Model for RSA Modular Exponentiation"
+ depends on DM
+ help
+ If you want to use driver model for RSA Modular Exponentiation, say Y.
diff --git a/drivers/crypto/rsa_mod_exp/Makefile b/drivers/crypto/rsa_mod_exp/Makefile
new file mode 100644
index 0000000..915b751
--- /dev/null
+++ b/drivers/crypto/rsa_mod_exp/Makefile
@@ -0,0 +1,7 @@
+#
+# (C) Copyright 2014 Freescale Semiconductor, Inc.
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+
+obj-$(CONFIG_RSA) += mod_exp_uclass.o mod_exp_sw.o
diff --git a/drivers/crypto/rsa_mod_exp/mod_exp_sw.c b/drivers/crypto/rsa_mod_exp/mod_exp_sw.c
new file mode 100644
index 0000000..dc6c064
--- /dev/null
+++ b/drivers/crypto/rsa_mod_exp/mod_exp_sw.c
@@ -0,0 +1,39 @@
+/*
+ * (C) Copyright 2014 Freescale Semiconductor, Inc.
+ * Author: Ruchika Gupta <ruchika.gupta@freescale.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <config.h>
+#include <common.h>
+#include <dm.h>
+#include <u-boot/rsa-mod-exp.h>
+
+int mod_exp_sw(struct udevice *dev, const uint8_t *sig, uint32_t sig_len,
+ struct key_prop *prop, uint8_t *out)
+{
+ int ret = 0;
+
+ ret = rsa_mod_exp_sw(sig, sig_len, prop, out);
+ if (ret) {
+ debug("%s: RSA failed to verify: %d\n", __func__, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct mod_exp_ops mod_exp_ops_sw = {
+ .mod_exp = mod_exp_sw,
+};
+
+U_BOOT_DRIVER(mod_exp_sw) = {
+ .name = "mod_exp_sw",
+ .id = UCLASS_MOD_EXP,
+ .ops = &mod_exp_ops_sw,
+};
+
+U_BOOT_DEVICE(mod_exp_sw) = {
+ .name = "mod_exp_sw",
+};
diff --git a/drivers/crypto/rsa_mod_exp/mod_exp_uclass.c b/drivers/crypto/rsa_mod_exp/mod_exp_uclass.c
new file mode 100644
index 0000000..266f094
--- /dev/null
+++ b/drivers/crypto/rsa_mod_exp/mod_exp_uclass.c
@@ -0,0 +1,31 @@
+/*
+ * (C) Copyright 2014 Freescale Semiconductor, Inc
+ * Author: Ruchika Gupta <ruchika.gupta@freescale.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <u-boot/rsa-mod-exp.h>
+#include <errno.h>
+#include <fdtdec.h>
+#include <malloc.h>
+#include <asm/io.h>
+#include <linux/list.h>
+
+int rsa_mod_exp(struct udevice *dev, const uint8_t *sig, uint32_t sig_len,
+ struct key_prop *node, uint8_t *out)
+{
+ const struct mod_exp_ops *ops = device_get_ops(dev);
+
+ if (!ops->mod_exp)
+ return -ENOSYS;
+
+ return ops->mod_exp(dev, sig, sig_len, node, out);
+}
+
+UCLASS_DRIVER(mod_exp) = {
+ .id = UCLASS_MOD_EXP,
+ .name = "rsa_mod_exp",
+};